SWAROVSKI ELEMENTS 6mm 5601 cube bead. These crystal beads have bevelled edges which adds to the number of sparkly facets. They are available in Crystal & Crystal AB and also in 4mm & 8mm sizes. The hole size is approximately 1mm. These 6mm Swarovski crystal beads provide classical elegance to designs. To give an idea of the difference between the sizes please see the additional image showing all the sizes photographed together. Crystal AB is crystal with a coating on one half that reflects light with a yellow and blue tinge, like the surface of a bubble.